ajax 有关问题

ajax 问题

JScript code

function sendData() {            var xmlHttp;            if (window.ActiveXObject)  //是否支持ActiveX控件            {                //支持ie为构造函数输入参数Microsoft.XMLHTTP,创建一个XMLHttpRequest                xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");            }            //ActiveXObject创建失败，非ie            else if (window.XMLHttpRequest) {                xmlHttp = new XMLHttpRequest();            }            else {                window.alert("该浏览器不支持AJAX,请更换浏览器");            }                                    if (xmlHttp != null) {//对象实例化成功 开始干活0.0                var CurrPage = document.getElementById("lblCurrPage").innerHTML;                xmlHttp.open("get", "AjaxLoginEmps.aspx?CurrPage=" + CurrPage + "&p=" + Math.random(), true);                //调用open()方法并采用异步方式                                xmlHttp.onreadystatechange = function() {                    alert(xmlHttp.readyState);                    if (xmlHttp.readyState == 4 && xmlHttp.status == 200) {                        var objs = xmlHttp.responseText;                        objs = eval("(" + objs + ")");                        objs = objs.Province;                        var drp = document.getElementById("drpPro");                        for (var i = 0; i < objs.length; i++) {                            var opt = document.createElement("option");                            opt.text = objs[i].name;                            opt.value = objs[i].id;                            drp.options.add(opt);                        }                    }                    else {                    }                }                xmlHttp.send(null);            }        }